Patent US2595556A successfully refreshed from Google Patents.
US2962231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of ores
Assignee: Individual
•
Filing: 1957-04-16
•
Granted: 1960-11-29
•
Expires: 1977-04-16
Abstract
No abstract record available.
Inventors
- 👤 Weston David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:46
CPC Classifications
B; B03; B03B; B03B9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD OF BENIFICIATING MAGNETIC IRON ORES CONTAINING AGGREGATES OF SUBSTANTIALLY BARREN GANGUE PARTICLES AND A NON-UNIFORM DISTRIBUTION OF AGGREGATES OF PRIMARY CRYSTALS OF THE MINERAL TO BE RECOVERED, SAID METHOD COMPRISING, PASSING THE ORE THROUGH A DRY MILLING CIRCUIT, COMPRISING A COMBINED DRY CRUSHING AND GRINDING MILL AND WHICH IS ADAPTED TO PRODUCE A SUBSTANTIAL PROPORTION OF PRODUCT IN A SIZE RANGE LARGER THAN THE PRIMARY CRYSTAL SIZE OF THE CONTAINED MINERAL, COLLECTING MILLING CIRCUIT
Claim 2
Independent Claim
76 words
A METHOD OF BENIFICIATING MAGNETIC IRON ORES CONTAINING AGGREGATES OF SUBSTANTIALLY BARREN GANGUE PARTICLES AND A NON-UNIFORM DISTRIBUTION OF AGGREGATES OF PRIMARY CRYSTALS OF THE MINERAL TO BE RECOVERED, SAID METHOD COMPRISING, PASSING THE ORE THROUGH A DRY MILLING CIRCUIT, COMPRISING A COMBINED DRY CRUSHING AND GRINDING MILL AND WHICH IS ADAPTED TO PRODUCE A SUBSTANTIAL PROPORTION OF PRODUCT IN A SIZE RANGE LARGER THAN THE PRIMARY CRYSTAL SIZE OF THE CONTAINED MINERAL, COLLECTING MILLING CIRCUIT
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |